Phase locked loop

Details Phase locked loop Phase locked loop

2006-09-28

2010-06-08

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S017000

Reexamination Certificate

active

07733188

ABSTRACT:
A phase locked loop is disclosed. One embodiment includes a phase comparator having two phase comparator inputs and a phase comparator output. A filter having a filter input and a filter output is provided, wherein the filter input is connected to the phase comparator output. A voltage controlled oscillator has a first oscillator input and an oscillator output. The first oscillator input is connected to the filter output and the oscillator output is connected to a first of the two phase comparator inputs. The oscillator has a second oscillator input. A coupling element is connected in parallel to the filter and arranged between the phase comparator output and the second oscillator input in such a way, that an output signal of the phase comparator is amplified and input to the second oscillator input.

REFERENCES:
patent: 4942370 (1990-07-01), Shigemori
patent: 5600272 (1997-02-01), Rogers
patent: 6583675 (2003-06-01), Gomez
patent: 7209017 (2007-04-01), Sze et al.
patent: 2006/0208805 (2006-09-01), Galloway et al.
patent: 2006/0255864 (2006-11-01), Vandel
patent: 3806461 (1989-09-01), None
patent: 102006012428 (2006-09-01), None
patent: 01218214 (1989-08-01), None
“Modeling, Design and Characterization of a New Low-Jitter Analog Dual Tuning LC-VCO PLL Architecture”, Roberto Nonis, et al., IEEE Journal of Solid State Circuits, vol. 40, No. 6, Jun. 2005.

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